FIELD: polymer production.
SUBSTANCE: invention is dealing with catalytic system that may be used for polymerization-mediated production of diene elastomers constituted by polyisoprenes and polybutadienes, invention thus concerning preparation of said catalytic system and production of diene elastomers having high percentage of cis-1,4 units and polybutadienes. Catalytic system is based on: at least conjugated diene monomer, organophosphorous acid salt with one or more rare-earth metals, alkylation agent represented by alkylaluminum of formula AlR3 or HAlR2, and alkylaluminum halide as halogen donor. Catalytic system is prepared such that above-mentioned salt is in the form of suspension in at least one inert and saturated hydrocarbon solvent selected from aliphatic or alicyclic series and molar ratio of alkylation agent to rare-earth metal salt ranges from 1 to 5. Diene elastomer production process is carried out in presence of above-defined catalytic system in inert hydrocarbon solvent and in presence of polymerizable conjugated diene.
EFFECT: achieved reproducibility of macrostructure and microstructure characteristics, stable activity of catalytic systems in conjugated diene polymerization reaction, and low coefficient of polymolecularity of polyisoprenes.
15 cl, 2 dwg, 4 tbl
